Kikuchi Gorge

Spreading across the northwestern side of the Aso Outer Rim, this expansive forest area covers roughly 1,193 hectares. Sitting at an elevation of 500-800 meters, it preserves the untouched beauty of the crystal-clear spring water flowing from the outer rim of Aso and the abundant surrounding nature.

The underground spring water running through the dense broadleaf forest is remarkably clear-so transparent that you can easily see the riverbed. Though the flow is gentle, it also serves as the source of numerous waterfalls of various sizes. Highlights include the curtain-like “Kakemaku Falls,” the dawn-evoking “Reimei Falls,” and the mystical “Ryūga-fuchi,” which is steeped in legend.

The pristine forest-home to species such as fir, hemlock, and zelkova-adds to the gorge’s refreshing atmosphere. Its seasonal beauty, which changes dramatically throughout the year, has earned it the reputation of being “the pinnacle of gorge scenery.” Whether it’s the lush greenery of spring and summer, the vibrant foliage of autumn, or the snowy stillness of winter, spending quiet time here surrounded by negative ions offers a deeply rejuvenating experience.

For exploration, the 1km round-trip “Healing Course” and the 2km round-trip “Negative Ion Course” are especially recommended. Because portions of the trails can be wet from spring water, be sure to wear comfortable shoes and bring items like a towel.